<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>页面结构分析</title>
</head>
<body>
<header>
<h2>网页头部</h2>
</header>

<section>
    <h2>网页主题</h2>
</section>

<footer>
    <h2>网页脚部</h2>
</footer>

</body>
</html>